separate scope differently in the macro

src/main.rs

@@ -31,7 +31,7 @@ use visibility_system::VisibilitySystem;
 macro_rules! register {
     // $gs is needed to get the scope at the usage point
     // $Type is the Component type that is being registered
-    ($gs: ident, $( $Type: ty ),*,) => {
+    ($gs: ident <- $( $Type: ty ),*,) => {
         $(
             $gs.ecs.register::<$Type>();
         )*
@@ -195,7 +195,7 @@ fn main() -> rltk::BError {
     let mut gs = State { ecs: World::new() };
 
     register!(
-        gs,
+        gs <-
         Position,
         Renderable,
         Player,